Bollettino valanghe

Tetons

Bridger-Teton Avalanche Center
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Pericolo valanghe

Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 7 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Yesterday’s cold front brought strong winds and up to six inches of new snow to the mountains, and recently formed wind slabs increased in size. On a variety of aspects at the mid and upper elevations, skiers and riders could easily trigger these large to very large slabs in steep, wind loaded avalanche terrain, and natural activity cannot be ruled out. Some potential may remain for these slabs to step down to persistent weak layers of faceted snow near the base of the snowpack. Similar, smaller wind slabs could be triggered at the lower elevations on steep, leeward slopes. Don’t let blue skies and powder impair your judgement; great skiing and riding can easily be found in low consequence terrain. If you choose to travel in avalanche terrain, expert snowpack and terrain evaluation skills will be required.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    2–3

    Strong southwesterly to northwesterly ridgetop winds during yesterday’s frontal passage easily transported new and existing snow, and wind slabs that formed earlier in the week gained depth and volume. These slabs reside above crusts, wind pack and dense, settled snow. Failure could occur on these old snow surfaces or on density changes within the recent abundant snowfall. Above 7,500 feet, backcountry travelers are likely to trigger these slabs to depths of two to five feet in steep, wind loaded terrain. Below 7,500 feet, these slabs could be triggered with depths up to two feet. As the day warms, these slabs may become more susceptible to failure on sunlit aspects.

Avalanche Discussion

Another cold front will drop down from the north late tonight and into Monday. With limited moisture, only an inch or two of new snow is expected. Cloud cover will increase as the front moves through the region. Overnight lows in the mountains will be near zero before rising into the mid-teens during the day. Ridgetop winds will veer to the north and increase to 15 to 25 miles per hour.With decreasing settlement rates and the absence of any significant faceted layers in the upper portion of the snowpack, the general avalanche hazard is expected to be Moderate above 7,500 feet on Monday. In very steep, wind loaded terrain, skiers and riders still have the potential of triggering recently developed wind slabs with depths ranging from one to four feet. Below 7,500 feet, backcountry travelers might be able to trigger an isolated pocket of wind slab up to 18 inches deep on very steep isolated terrain features that have been recently wind loaded.In the Southwest Trails and Togwotee Pass forecast zones, some potential might remain for persistent deep slab avalanches to be triggered in areas where the snowpack is on the shallower end of the spectrum. If one of these large to very large avalanches were to occur, they would more likely be stepping down from the release of a wind slab or triggered by a cornice drop.

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